Trouble Shooting Check List:
PROBLEM & PROBABLE CAUSE:
- VISIBLE EXHAUST DUST LOSS
- Missing Bag – dust loss will be constant, not in synchronization with valve blasts.
- Improperly installed bags. Loose clamp or bag tops not clamped between cage and venturi collar.
- Holes in bags. Can be from either
Mechanical damage during installation, abrasion, thermal or corrosive attack, or worn out bags. This loss is generally cyclic and in synchronization with valve blasts.
SOLUTIONS:
- Locate and replace missing bag.
- Inspect bag connections.
Retighten bag clamps.
- Inspect for worn or damaged bags.
- Failure to clean plenum after massive bag failure.
- Always check plenum, clean if necessary before installing new bag set. This will generally clear up.
*Plugging the venturi with a surgical cork from the clean air side of the collector is a quick temporary measure to stop leakage until such time that the bag or cages can be replaced.
LOSS OF COMPRESSED AIR
- Piping leaks.
- Debris in diaphragm valve.
- Dirt in solenoid plunger.
- Electrical short
HIGH DIFFERENTIAL PRESSURE
1Over Volume
- Compressed air pressure below 75 psig
- Timer skipping one or more valves.
- Reverse leakage through rotary valve.
- Other air short circuits – piping leaks, door gaskets, etc.
- Dust on clean side of bags from plenum
- Binding due to condensable.
- SYSTEM VOLUME TOO LOW
- Fan running backwards.
- High differential pressure.
- Fan belt slippage.
- Air short circuiting.
- Retighten fittings.
- Remove cover and clean.
- Remove cover and clean.
- Refer to wiring diagram and check for proper connections.
- Cut back on fan damper at individual inlet pick- ups.
- Check for system leaks, new usage or as above. Check compressed air valve assembly.
- See Timer Diagram
- Check for wear or damage.
- Repair as required.
- Clean plenum chamber and inside of bags after previous bag failure.
- Change operations up stream so that liquids remain vaporized through unit. Usually operating cleaning mechanism with fan off or with fan on but no solids flowing will permit recovery.
- Correct fan rotation
- Review Section C above.
- Tighten or replace belts.
- Check piping, rotary valve and collector flanges for leaks.
- System blockage.
- TIMER PROBLEMS
- Timer does not operate. wiring diagram
- Power “ON” indicator not lighted.
- Timer operates, solenoids do not operate.
- Timer operates one or more.
- Improper Timer Sequence.
Check piping for build up or foreign blockage. Check bags for binding.
Bags should be soft to the hand.
- Check for faulty wiring – refer to
- Check wiring diagram with input/output terminals for short circuit. Check for blown fuse.
- Check wiring diagram for valve common open.
- Check valve continuity for faulty solenoid circuit. Check output light and voltage at terminal for faulty output terminal. Check solenoid valve, clean/repair/replace parts if required.
- Check valve “on” and “off” times.